How to determine the size of Chimney !!!

[Rajbilt]

I am about to complete a 50 inch Pompeii oven and would like to know if there is a formula to determine the area of chimney that is to be built over the arch.

Thanks in advance for your replies.

[Gulf]

Hi Rajbilt,

My advice is to repost this under the build thread that you have already started. It wil help keep the continuity of your build for future reference.